Portable elevator



Nqv. l1, 1930. R. DE LAMAR PORTABLE ELEVATOR Filed April 1o, 1`928 2 Sheets-Sheet l INVENTO 52e dL/Lr,

ATTORNEYS Nov. 1l, 1930. R. DE. LAMAR PORTABLE ELEVATOR 2 Sheets-Sheet 2 Filed April 10, 1928 INVENTO ATTORNEY A RUDOLPH DE LAMAR, oF NEW Y I BAYONNE, NEW Jnnsnxj y Patented Nov; 11,

UNITI-:DI Si'liT1515l PATE kA'ss'IGNoR To YORK, N. Y.,

' p ronrAisLE ELEvAToR 1 i Lf Application inea April 1o,

i This inventionrelates in general to elevat- CII ing apparatus and; particularly to portable elevators and so-called tiering machines which comprise al portable lvertical frame upon which is vertically movable by hoisting apparatus a load-carrying platforrm The frames of such elevators are now commonly of the platform arranged in opposite 'angle bars, are not so objectionable from the standpoint of twisting or warping of the frame, but a large amount of material and labor are necessary inthe construction of such an elevator, and the frame is large and cumbersome. 1 'i Accordingly, one object oflmy invention is to provide aV portable elevator having a p frame embodying novel and improved fea-- tures of construction whereby Atwisting, or warping of the frame is reduced to a minimum, and a maximumofstr'ength and re'- sistance to strains in all directions Vis obtained with a minimum amount `ofmaterialV and labor cost. This object is. accomplished in one manner by the useof a metal bar for Y the side ofthe velevator frame which has ,a main web and two flanges integral with and projecting fromf said web in opposite4 ,direc-A tions at opposite longitudinal sides ofk the web.. Oneof said langes'is utilized as the guideway for the platformV rollers,` one roller..

t elevator embodying amy-invention;

192s,"` seriai No. 268,905. y

ofthe platform being arrangedA at each i side offsai-d flange.

Other" objectsof the y*invention `will morefully appear from Vthe following description Ain connection with the acoompanyingdrawings, in which corresponding andl likeparts are-` designated throughout the several view s bythe same reference characters# Referring to said drawings, 1 u Y Vf Figurel is aside 'elevationof av portable `Figure 2 is a Afront elevationA thereof' vlfigure is Van enlarged vertical sectional view 'through thehoisting apparatus,V taken'` on the line 3-3 of Figure l; Y p e Figure 4lis'a side elevation of -the apparatus shownin Figure 35 viewing the same from the line 4 4', andi f 'Figure 5 is;` an tional view,` taken on the line 5 5 of Figure l.

i hSpecifically describing the-illustrated bodiment of the invention, thel'reference character A designatesthe main vertical frame of the elevator which-ismountedupon a horizontalV base Bfin-the' form of awheeled4 truck. f The frame Acomprisestwo vertical so-called Z-bars. l each oft-which ,comprises a webl `2 ,having at lopposite longitudinal edges thereof flanges .3 disposedv at right angles to the-plane ofthe web and extending in oppositedirections," These bars l are,- arrangedv in spaced yrelation, with the webs parallel and one of the-flanges ofr each of th'e'bars eXtend-ingtowardthe corresponding Vflange Vof vthe other iba-r, as clearlyl shownin VFigure 5 of the drawings,` Thebars ly are connected. together at space-d points in their length bytie barslf;` f o 1 i Mounted on .thefbars'of' frame Arto mov e" HENRY's IGfERMONn, JR., orv

enlarged horizontal secvertically up andlownA is a load-carrying A platform C' which has a, load-receiving portion 5 and a' supporting arm 6 arrangedat right anglestoythe portion Sand-.carrying at: opposite ends thereof a pair-ofl substantially has its other'fendconnected as at G. tothe fio- Y cylindrical-rollers 7, one roller of each `pair i being arranged upon each side fof the corre-fV i er sponding flange 3, as-clearly shown in Figures 1 and 5 of the drawings` actuated up and down'on'the frame A by a hoisting apparatus generally .designated D` to which ,isconne'cteda cablel E which passes over a pii1leyf1 `-y at the top of the frame A yand *platformC.` i if v e e Y t It has been foiind in practice Jthat-the'frame 1 vA ofanf'elevator'so constructed'is.siibstaiitial Y lyri'igid in all directions, .y y s @any notwistiilgfmotionlor sWnging-zoftlie '15 t Y form fully loaded and atfthe ,top of thefram'eljA This visibelieved to be ldiie to the Vfacttliatthevef frame Iin direction even withv the'fpfhlattwo flanges 3`arrangedjatriglit angles' to the web 2 reinforce saidA webvagaiiist' anyxtwistlj:

ing out of its plane,and the plane of the web 2-bingin 4the direction" of theY strain's im'- i V'posed-upon the'V frame by the platform, effectively holds the frameagain'stlateral swing- Y parts inv. In otherfwo'rds,'any torsional or twisting strain on theweb' 2 of the bai# i must tend" j to throw .the'vj longitudinal edges of the'fweb of heli-nes, and these'tendencies areali most entirely counteracted the flanges 3,

Y sito? Y c ly parallel tothev planes of strains onthe' Y 'f'fThe `hoistingl'fapparatusY' DVrl comprisesida'V -rhoisting dri'iml8 mounted on the shaft 9 andv around which 'is woundthe cable'lljfv A gear 41() 'isconneclted tothe driim and mesheswit-h* the' planes of whichfare disposed substantialafpin-ionfllgona shaft 12 connected to a gear 1,3 which in 4turn mesheswith alpin-ion 14 fast connected to La gearv l157011 a shaft 16. l The gear ljm'es'he's'fwitha pinioiif 17 on a shaft ,v 18 uponwhichis rotatable a brakedrum 19.v

Y The ir'iteriorofthev drum has aratchet 20Y with whichcooperates a'spring pawl 21 car-l Vfied by 'an am 22 4fixeelulpmi ai@ Shaftis wliichiis 'adjustably mounted onthe partition1V :pairf brake ,shoes -23 surround the brake .driimv and ar'e independently- 'connected at,r

their.l lower ends by Y'pins 24 to,v a vbracket25 26 off afho'usin'g for the, hoisting' mechanism.

This bracket" "haS "2i plurality `ofslots 27 through which'pass'bolts 28 carrying nuts29 at opposite sides fof; the bracket.v v i, The bolts ,2`8are'f'fast connected to thefpartitioni26 in any 'suit-able;Tinannei".V ith thisConstructi-oiiit will beobser'vedthat the brake shoes 23in`ay be adjusted vertically' and horizontally with y, nuts 29'onthe boltsaiid by horizontal sliding of the Vbracket 25relati`vely'to said bolts.V "It isY thus 'possiblel t'o ,f provide accurate Y 'contactf fthbraliefshoes with the brake` drumand i V' to' compensate; for wear, Ther othereiids of Y tl'ie'biake shoes'afreinfluencedijtowardeach so iaslto forc'e'thebrakefshoes'into Con- Y tact with the drum by means of a compressionA Therplatform C is y spring 30 which isinterposed'ibetween 'one .of

thebralie shoesaiid a' nut- 31 on abolt .32 which' connectstlie two brakeA shoes; VFor actuating the bmi@ Shoes. out of' engagement withthe Vdrum 19Tv providea substantially square actuating block 33 which has-round corners 34,

saildblock being disposed vwith two vertical parallel Sides. in;

heads 36.' Uponfrotationof the shaft 35 ing application Serial No; 363,784, filed May 17:,

mounted'ona rotatable shaft.y `v35.Y `This blockv 33f'cooperates wit-hibearing e 'heads 36' mountedlonthegends ofscrews e adjustabl'y mounted in tliefrespectivebrakey 175' e y The 'brakejslioes'f @areV norinall'ygin con'- *c tac'twitli the' drum 19`nii'cler theinfluence of and lthere is'plactin;the:.-springw-30, and theV block l33 is normally j I theiblloclj isrotated sothat liagonally'op-xv posi e corners'thereof arebroughtfiiitozconf` v,tact#withthelbeairirigihead36, 'so` as to' force y f t the brakev 'shoes awayfroin the driiivn',V f When the shaft 35 is released lthefspring 30 :returns thebrake 'shoes to norinzfil.pisitioin;v zTliisVV brake'mechanism is claimed in my copendingj portion 38 to vreceive asuitable oranlrhandle i for rotatingtlieY shafts, andthe shaft'i-is:

Vforiii'e'd with; a :similar 'polygonal end 3,9 'to' employed'if desired;

Y c* In operation, to raise the :platform;C,.ia

' receivethecrank handle; buta motorfmaybe l Y, ,i Y ioo 16 or l'and` otatedA inthe `proper direction;V which through the gears1?,.1-5,14, 13, lliandr 10 causes rotation of theY drum 8 and winding j Y of thecable .Ethere'oil i During this opera- Vtionfthe pawl221 passesfreelyoverthe ratchetk teeth `2O, .but when the cran'k isxreleased :thf Y pawl engagesoneof the teeth 2() so as'to'liold e ythey platform in thereleva'ted positionf To.` Y

permit the 'platform to descend, Athe cranlis i yapplied tothefshaft Lwhichis rotated and through movement of th'eblocl 33 'moves'the i brakeshoes out lof vcontact with vthe brake 'drum 19. Backward rotation ofthe shaftst 16 and-'18 and thecable drumf-S is'thusperinitted and?. ythe f *platforms Lde'scends Y by iis in .any Suitable'maiiner upon Ythe frame,loiit preferablyfar'ef associated with'a housing 'or y Casing fsf.thelhlstlng'inehasm; Said @as beingfshowiiiijthe Dr'ent instance as coi which said' 'shafts Aare j ournalecLfsaid wallstY I beingv connected at Vthe' top a wall' 42 and ati the'"bottoni andvpartof Onelsidevjby 'a'w'all 4 n and spaced fromtlief'drum"y 8,"f'as lindicated;at

r44,l vand a removable cover `sup'pleiiients thev i Thefinterinediatle; partition 26 `also'fconnects i; `'said'frontaiid rear walls; The-wall'43 has'fa`V Aportion thereof substantially4 concentric with f 'The'hoistingapparatus hasbeen illustrated. -formanual operation, each of the shafts'l v and;18'beingmpi1ovided with a polygonal end Y l oil. This oil is splashed upwardlyby the drum andA gear during operation thereof onto the pinion 11, gear 13, pinion 14, gear A15 and pinion 17. The pinion 17, gear 15 and pinion 14 are enclosed within a` supplemental or auxiliary casing 47 which communicateswith the oil chamber through, the opening 48 in the partition 26 through 4which the oil is thrown. upwardly onto the pinion 14, etc. Above the partition 26 no side walls arevprovided in the. housing for the reason that free access to the brake mechanism is desirable, Yand'it is not desirable to enclose thev brake mechanism within the same casing as the gears for the reason that oilnon the brake would be very detrimental.

While I have shown and described the insubstantially right angles to said webs, said bars being disposed .withv one flange of one bar.

extending toward the corresponding flange of the other barand in the sameiplane, a plurality of tie bars connecting the other flanges of said bars, a load-carrying platform having va setf of rollers mounted to run on the iirst-menf tioned flange of each bar, the lrollers of each set being disposed at opposite sides of'the'respective flange, and `means for yraising and lowering said-platform.

' vention as embodied inonespecific form of f apparatus, itk will beunderstood that this isV primarily for the purpose of illustrating the ,g

principles of the invention and that manyl modifications and changes may be madev in the details of construction of the apparatus without departing from the spirit or scope of the invention. Therefore, I do not desire to be understood as limiting myself except as re-` quired by the followingy claims when construed in the light of the prior art.

Having I claim is:

1. An elevating apparatus comprising a vertical frame including a pair of spaced bars each having a web parallel to t-he web of the other and a pair of flanges extending in opposite directions at substantially right angles to said webs, a load-'carrying platform having a set of rollers mounted to run on one flange of each bar, the rollers of each set being disposed at opposite sides of the respective flange, and means for raising and lowering said platform.

2. An elevating apparatus comprising a base, a vertical frame mounted thereon including a pair of spaced bars each having a web parallel to the web of the other and a pair of flanges eXtending in opposite directions at substantially right angles to said webs, a plurality of tie bars connecting one iiange of one bar to the corresponding flange of the Vother bar, a load-carrying vplatform l having a set of rollers mounted to run on the v other flange of each bar, the rollers of each setr being' disposed at opposite sides of the respective Viiange, and means for raising and -lowery ing` said platform.

3. An elevating apparatus comprising a base, a. vertical frame mountedthereon inx thus described the invention, Vwhat i y RUDOLPHDE LAMAR.;

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